Apparatus for forming weftless cord fabric



Aug. 6, 1929. M. CASTRICUM APPARATUS FOR FORMING WEFTLESS CORD FABRIC Filed Oct. 51, 1924 I N VEN TOR.

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Jitpplieation riled tlcteher "t This invention relates to apparatus :tor niahing Wettless cord ttabric, i. e., sheet niaterial ll'orined oil a plurality of parallel cords embedded in a matrix oi rubber, and has tor particular object the provision ozt an apparatus ct this kind which is adapted tor use with a standard tour-roll calender ot the type having the top roll oil'set. 'lhe apparatus is not however, restricted to use on calendcrs eat this type.

lteterring to the drawings l is a side elevation ot the apparatus, one side oi the calender tranie being removed and the calender rolls heing shown in section;

Fig. 2 is a front elevation of the cord guiding means shown in l it, taken troni the. lett in that figure;

Fig; 3 is a detail ot a cord guiding copih talten on line 33 oi Fig l; and

Fig d is a detail section of a cord gripping device, Wit/l1 the in a diilierent operative position from that shown in Fig: 1.,

lln the in airing of Wettless cord i'ahric hr the calendering process it has been proposed, as tor example in my prior Patents 1 5%,232 and Lhtltlfliiat, to guide the cords by a suitable spacing device to a roll which presses against one roll of a usual rubher sheeting calenderu The same general method is followed in this case the changes made being for the purposes of adapting the guiding device to a tour-roll calender or increasing the accuracy With which the cords are spaced, of increasing the accessibility ot the cords so that errors and hrealts may he more easily corrected and oil quiclrening the speed With which the guiding device can he put in or taken out elf opera. tion,

The spacing device has heen shown in the drait ings as associat With a tour-roll calender rolls l0, ti and if; at which are arranged in vertical staclr torrnation, While roll l8 is the side of roll l2 The two teeds oi ruhher shown. at it and l5, ltorrning sheets l6 and M nectirelyl The calender rolls 6 Well ices to t. it t lltttil- W ,"ltlhllilllllil- GURU llltltldlitlitt.

towards or away from the calender unless the slides are locked. Fduch locking is accomplished hy screw dowels 526, one threaded into each slide 20 and fitting into a hole in the neighboring slideway @n each slide 20 are guides receiving a second slide 28 upon which the cord guiding devices are mounted. it shaft 29 extends between hearings on the slides 2U, carrying a handivheel St] and worms 3i. 'lthese \vornis each mesh with a ivorinwheel. 232 on a short shaitt rotatable in brackets 3t attached to slides 20 hut lined against endivise movement in thorn, tlne end oi each shat't is threaded into a depending lug attached to slide 28. lliy rotating the handwheel 30 the short sha its 33 can he rotated sin'iultaneously, causing the slides to he moved hachwards or torivards on slides 20. .t LS contrasted with the quiet: movement accomplished through turning handwheel 25, the train of mechanism coin trolled by handirheel. 30 produces a slow movement 'lihe first is used for placing the i g devices in or out ot operative relation With the calender. the second for varying the pressure with Which the cord supplying roller is itoi'ced against the calender roll 11. lt he cord supplying roller 38 is mounted in hearings at the forward end ot slides 253., Directly hack oi this roller is a rod 37, held against rotation in. the slides by clamps 3t; and screw-threaded over its entire eit'cctive length on a pitch corresponding to the spacing de sired tor the cords. 'lhe itunction ot this rod is to insure ahsolute accuracy in the cord spacing the last moment before the cords reach the smoothsurlaced roll While owing to the siinplicity and cheapness ot the rod owing to the use of screw threading er than circunrtereintial groorin and to readiness nrored id repla'cetlt, adjustments tor dill'e a cord spacings can he i ide tlttlltiltlyu Zlhe rod heing stations y it is asihle to use screwinstead. ot succession. ot cireuur es the latter pe oi con? ed thecords are gui u acin e U notes on p 1 1e cords la rod 8 rod 39 is pi m her. nraclie with which the rod may he 3 (ill i y This comb may be of any suitable type,but

to facilitate adjustments I prefer to make it of the lazy-tongs type having teeth only on those bars of the tongs extending in the same direction. A small portion of the comb is illustrated in Fig.3. It is composed of sets of bars 41 and 42, pivoted together at their ends 43. A rod 44 runs from end to end of the comb structure and has on either side of the center threaded portions of opposite hand. Preferably there are a plurality of these threaded portions at each side with different pitches, chosen to correspond with the movement which should be imparted .to spaced control points on the lazy-tongs. At intervals along the comb nuts 45 are attached to bars 41, being threaded over the rod. The' teeth 46 of the comb are shown as being attached to bars 42. This type of comb is de scribed, with some refinements not necessary to go into here, in my prior application Serial No. 720,194, which has matured into Patent No. 1,531,689, dated March 31, 1925.

At the end of rod 44 is a sprocket 47 connected by a chain 48. with a sprocket 49 on a short shaft 50. Mounted on this shaft is a ratchet mechanism of any standard type, shown as provided with a handle 51. A handwheel could of course be used, but the construction described affords less interference with the room necessary for the cords. A rod or bail 52 guides the cords into proper relation with the comb.

When the production of fabric is to be stopped it is necessary to secure the ends of the cords in some manner. It has been proposed to tie the cords at this time around some support, and while this will work satisfactorily, as has been proved in practice, I have devised a very desirable refinement for use in this part of the operation. Extending between the lugs 35 is a bar 53 threaded to receive screws 54 which support at their upper ends a clamping piece 55. By turning the screws, or by the use of anyequivalent device, the clamp .may be elevated to hold the cords firmly against roller 36. If the cords are thus clamped before they are cut, while they are still under tension and properly spaced, they will be held in this condition as long as it is desirable to have the calendar remain idle in the making of weftless fabric. This clamping will also be effective whatever the position of the slides 20 and 28. sagging of the cords out of the teeth of the comb when the cords are clamped as described and the guiding device backed away from the calender is prevented by bails 39 and 52.

Having thus described my invention, I claim:

1. A cord guiding device for use in the manufacture of weftless cord fabric, comprising means for supporting a rubber sheet, a smooth surfaced roll positioned adjacent such means, a rod fixed against rotation adjacent the roll and screw threaded throughout its effective cord guiding length, and means for directing a sheet of parallel cords over the surface of the fixed rod, whereby the cords are arranged in accurately spaced relation by the fixed rod and delivered in such relation to the rubber sheet by the roll.

2. A cord guiding device of the type in which a sheet of parallel cords are positioned against a rubber sheet by a rotatable roll, characterized by a rod screw threaded throughout its effective cord guiding length and fixed against rotation in the path of the cords prior to their contact with the roll.

3. A cord guiding device over which a sheet of cords can be drawn to arrange the cords in accurately spaced position comprising a rod screw threaded throughout its effective cord guiding length and fixed against rotation.

4. Apparatus for use in the manufacture of weftless cord fabric comprising a four roll calender having its top roll offset, the outer pairs of rolls forming rubber sheets and the central pair pressing the two sheets together, a roll underlying the offset roll and contacting with the sheet of rubber on the lower of the central pair of calender rolls, and a comb mountedwith its open side downward and in a position to receive and guide cords traveling in a path slanting downwardly towards the said underlying roll.

MARTIN- CASTRICUM. 

